I just towed my 1982 Porsche 924 Turbo home today. It needs some work so I will posting some questions here over the next few weeks. The engine turns over but it will need a radiator. My question is, will a radiator from a NA (non turbo) car fit my 931?

Yes, 924 NA radiator is the same as 931. It is vitally important on the 931 that you have the dual fan shroud, and that the fan system is working correctly.

I can also heartily recommend converting over to the slightly better, lighter, and slimmer profile 944 radiator setup, including eliminating the 931 expansion tank in favor of the fender mounted 944 unit. New rads for the 924/931 are increasingly difficult to find, while the 944 stuff is relatively inexpensive and plentiful.

Thanks for the info. Do you know if there are any good YouTube videos or manuals that cover the Timing Belt/Water Pump replacement? I did this job on a 1988 944 but I don't know if it's the same for a 1982 924 Turbo.